Upload your desktop settings and resets to the cloud. On your Laptop with CC closed down. Delete you Laptop User ID Adobe CC preference folder. Then Start CC and download your CC settings an d Preferences so the two installations are synced with each other.
Start up time varies between machine because of thing like processor speed OS fonts loaded and differences in add-ons between machines.
First, see how many brush presets you have loaded. Too many might take a while to load.